Dakota 4WD V6-239 3.9L Magnum (1996)
Automatic Shut Down (ASD) Relay: Description and Operation
CIRCUIT OPERATION
Circuit A14 from the Power Distribution Center (PDC) supplies battery voltage to the contact side of the Automatic Shut Down (ASD) relay.
In the START or RUN position, the ignition switch connects circuit A1 from fuse C in the PDC to circuit A21. Circuit A21 supplies battery
voltage to the coil side of the ASD relay. The Powertrain Control Module (PCM) provides the ground path for the coil side of the relay on circuit
K51. Circuit K51 connects to cavity C3 of the PCM.
When the ASD relay energizes, it connects circuit A14 and circuit A142. Circuit A142 splices to supply voltage to the fuel injectors, ignition coil,
and heated oxygen sensors. Circuit A142 also splices to cavity C12 of the PCM. This input tells the PCM the ASD relay has energized.
